This block looked like it was a two colour block, but looking at the finished block it could be really interesting with more fabrics.
Here is everything all laid out and ready to go. The squares to the side are for the 1/2 square triangles on the centre white rectangles.
Here it is with the 1/2 square triangles. To make them I cut squares 1/2 inch larger than the finished triangle. Drew a line diagonally across the square and then sewed on the line.